Bag O' Sand

It's a little pocket that can be sown onto clothing. It is a non dimensional pouch, eternally filled with sand. Nothing can be put into the pocket. Sand must be taken out one handful at a time and cannot be dumped out. You can throw the sand at enemies as a Bonus Action with 5ft reach, assuming they have eyes. You and the other person make competing Dex throws. If successful, the enemy will have to take disadvantage on all ability checks and attacks till the end of our next turn. Estimated cost is 30 GP.  It is also very good sand for sandcastles.